Battery vent adapter



FIG. 1 is a perspective view of a battery vent adapter showing our new design;

FIG. 2 is a top view thereof, the bottom view being a mirror image;

FIG. 3 is a right side elevation view thereof, the left side being a mirror image;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a back elevation view thereof. 

CLAIM We claim the ornamental design for a battery vent adapter, as shown and described. 